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Received February 25, 2013
Accepted April 8, 2013
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Modeling volatile organic compounds sorption on dry building materials using double-exponential model
Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China 1College of Engineering, Kyung Hee University, Yongin 446-701, Korea
bqdeng@usst.edu.cn
Korean Journal of Chemical Engineering, July 2013, 30(7), 1380-1385(6), 10.1007/s11814-013-0056-1
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Abstract
A double-exponential surface sink model for VOCs sorption on building materials is presented. Here, the diffusion of VOCs in the material is neglected and the material is viewed as a surface sink. The VOCs concentration in the air adjacent to the material surface is introduced and assumed to always maintain equilibrium with the materialphase concentration. It is assumed that the sorption can be described by mass transfer between the room air and the air adjacent to the material surface. The mass transfer coefficient is evaluated from the empirical correlation, and the equilibrium constant can be obtained by linear fitting to the experimental data. The present model is validated through experiments in small and large test chambers. The predicted results accord well with the experimental data in both the adsorption stage and desorption stage. The model avoids the ambiguity of model constants found in other surface sink models and is easy to scale up.
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